# MonoStereo Synthesizer > Free analog mono synthesizer with oscillator panning and extensive sound shaping. (iPhone/iPad app by Juho Jantunen.) - Source: https://appshunter.io/ios/app/monostereo-synthesizer/id955790489 (this page in markdown: same URL + `.md`) - Developer: [Juho Jantunen](https://appshunter.io/developer/689636056) - Category: Music, Music, Entertainment - Price: Free - Rating: 4.71/5 from 7 App Store ratings · 13 written reviews indexed - Age rating: 4+ - Requires: iOS 7.0 · 5 MB - Languages: English - Released: 2015-01-15 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/monostereo-synthesizer/id955790489/reviews.md ## What is MonoStereo Synthesizer? MonoStereo Synthesizer is a free full-featured analog mono synth with oscillator panning. App Store Reviews: ***** "This is the finest synth in its class. It has great presets and something a little extra special on it. It cuts. It's simple. And it sounds fantastic!" ***** "Great sound and interface!" ***** "So great! I have already spent hours with this little gem. A three oscillator dream." The synth is completely free with no in-apps. If you feel the need to pay something for it, go see a gig by a local band! If that doesn't cover it, buy their t-shirt! (or their CD if you have one of those CD-players we used to have 3 years ago) Features: * Minimalistic size, fast loading time and CoreMIDI Support! * Audiobus and Inter-App Audio support * 3 Oscillators with customisable waveform (sine, square, saw), phase, level, detune and pan * Lowpass and Highpass filters * 2 LFO's with customisable targets from filter values to oscillator panning and detune * Filter and Amp Envelopes * Portamento (almost named that 'Glide' but came to my senses. Portamento is portamento!) * Delay and Chorus effects (very basic, I know) * A few presets * Saving and loading your own sounds * Virtual keyboard If you end up using this synth for production or live performances, I would be happy to hear from you! You can drop me an e-mail to jantunen.juho (a) gmail.com I have a long todo-list for the (possible) updates but I'm open to feature suggestions and ideas! ## Key features - 3 Oscillators with customisable waveform - Lowpass and Highpass filters - 2 LFOs with customisable targets - Filter and Amp Envelopes - Portamento - Delay and Chorus effects - Save and load custom sounds ## Recent user reviews (10 of 13) All indexed reviews: https://appshunter.io/ios/app/monostereo-synthesizer/id955790489/reviews.md ### 2/5 — Has potential *2024-11-03* Some very useable sounds but for me, without a hold note function on the built in keyboard or the ability to take a midi signal, it’s all but useless. Usually I can get round it by using the AUM keyboard which does have the hold function but alas that’s not an option either. Having said that, I may be able to use it in some way for one shots with a nice bit of Dubstation delay 😉 If the developer is able to easily update the hold function into this synth then that opens up a whole new use for me, which would be nice. I’ll hang on to it for a while and see what happens. This isn’t a moan, as it’s Free… just a suggestion 🤗 ### 5/5 — Excellent App *2016-10-02* Great range of usable sounds. Well behaved in Audiobus, and it's free! What's not to like? ### 5/5 — Pretty cool *2016-09-23, version 1.2* This app is a good start to the creation of many cool sounds. I do wish the preset sound choices weren't so few, which means that I'll have to roll up my sleeves and start creating sounds myself. But isn't that what this is all about? Cool early 80's sounds ### 5/5 — Great synth *2016-02-17, version 1.2* I connected this to Ableton and keyboard with iConnectivity. It works great, made a little latency correction (my gear is not ultra fast). Just making tests with Audiobus, looks good. ### 5/5 — Thanks, this is a great update *2015-11-02, version 1.2* Woo hoo is right, great to now be able to integrate this with sequencers and daw on the device. Big sound. No latency issues here ### 3/5 — Latency issues *2015-09-26, version 1.2* I downloaded the app with high hopes. Alas, it has severe latency problems. Almost a 1 second delay from the time you press a key before the keyboard responds. Unusable for live work. Even studio work will be difficult since you can't play in time with a source. The filters and oscillators seem very well done. Lots of cool sounds can be had. When latency get fixed, this could be killer.... Good work so far, dev. Keep it up! ### 5/5 — Wow!! *2015-07-21, version 1.1* This is the finest synth in its class. It has great presets and something a little extra special on it. It cuts. It's simple. And it sounds fantastic! I know there are a few homegrown mono synths out there, but none that sound like this. World class. And laid out perfectly. Extremely responsive. Latency is non existent. Thank u! It sounds amazing Total Gem. ### 4/5 — Nice Synth, very Utilitarian Chic, free, no strings! *2015-04-24* This is a very lovely little synth, not complicated, but beautifully laid out in such a way to give the uninitiated a peek into the working essentials of synthesis. Love the Portamento, and the overall sonic character. It would be great to see it get IAA or Audiobus, as it deserves that. Excellent! ### 5/5 — Amazing and great sounding update *2015-02-17, version 1.1* This guy knocks it out of the park! The definite analog vibe and sound is very welcome indeed! And not one bell or whistle. It would be nice if the detune range was able to do at a fifth above or below the center position for one note chords.But theres a lot of pure power waiting to be unlocked and modulated. So great! I have already spent hours with this little gem. A three oscillator dream.And you can save and name patches! Although it should also have the ability to rename or delete which I am sure it will get in a future update. Please give this audio buss and audio share ASAP! Peace Christo ### 5/5 — updated so fast u rock !!! *2015-02-04, version 1.1* update! wow that was a superfast update!!!!! loving the smaller keys and new design.old review --->.. i like the raw sound! the issue is when keyboard is being used half of the parameters can ot be used.. audiobus and audio copy are really needed. i enjoyed the basic,raw ballsy sound of this synth though! ## Frequently asked questions about MonoStereo Synthesizer ### What is MonoStereo Synthesizer? MonoStereo Synthesizer is a free, full-featured analog mono synthesizer for iPad. It offers extensive sound shaping capabilities with three oscillators, customizable waveforms, filters, LFOs, and effects. ### Is MonoStereo Synthesizer free to use? Yes, MonoStereo Synthesizer is completely free with no in-app purchases or advertisements. The developer encourages users to support local bands if they wish to contribute financially. ### What devices does MonoStereo Synthesizer support? MonoStereo Synthesizer is currently supported on iPad devices. ### How often is MonoStereo Synthesizer updated? The app was last updated on August 10, 2015, with version 1.2. While there is a long to-do list for potential updates, users can suggest new features to the developer. ### Can I save my own sounds with MonoStereo Synthesizer? Yes, you can save and load your own custom sounds with MonoStereo Synthesizer. This allows you to create and recall your unique sonic creations. ### Does MonoStereo Synthesizer have ads? No, MonoStereo Synthesizer is ad-free. It is a completely free application without any advertisements. ### What are the key sound shaping features in MonoStereo Synthesizer? Key features include 3 oscillators with customizable waveforms, phase, level, detune, and pan. It also offers lowpass and highpass filters, 2 LFOs with customizable targets, and filter/amp envelopes. ### What is the age rating for MonoStereo Synthesizer? MonoStereo Synthesizer has an age rating of 4+, making it suitable for a wide range of users. ## Version history (last 3 releases) ### 1.2 — 2015-08-10 This app has been updated by Apple to display the Apple Watch app icon. * Audiobus and Inter-App Audio support! Woohoo! * Performance optimizing ### 1.1 — 2015-02-03 - New completely updated interface! * All sliders replaced with knobs * New visual style * Smaller version of the keyboard available always at the bottom of the screen! - Bugfixes ### 1.0 — 2015-01-14 No release notes. ## Apps similar to MonoStereo Synthesizer | App | Rating | Price | Category | | --- | --- | --- | --- | | [Micah Synth](https://appshunter.io/ios/app/micah-synth/id1579750842) | 5.0 (19) | Free | Music | | [4Waves Synth AUv3](https://appshunter.io/ios/app/4waves-synth-auv3/id1545450649) | 4.6 (5) | Free | Music | | [APOLYVOKS](https://appshunter.io/ios/app/apolyvoks/id1456476986) | 4.1 (27) | Free | Music | | [Spirangle](https://appshunter.io/ios/app/spirangle/id1564964830) | 5.0 (27) | Free | Music | | [Howl: A formant synthesizer](https://appshunter.io/ios/app/howl-a-formant-synthesizer/id1067562312) | 4.2 (38) | Free | Music | | [ChowCentaur](https://appshunter.io/ios/app/chowcentaur/id1547671733) | 4.9 (30) | Free | Music | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*